To my mind, it is necessary to see your fear and to go straight ahead to it. But it doesn't work every time. That is the reason why I am looking for other ways. For instance, my husband does not like pest, rats and other ones. We tried to be in one room with them, he tried to be near, but it doesn't work. But when he found the ultrasonic device to carry them away, it was a great invention. May be sometimes it is worth to do so?